Randomly died after rebuild.

The motor was rebuilt about 1 month ago and everything has ran fine since. PCM4less did the tune for the 355, cam, and heads. The car has ran great and it just died yesterday when I got out to check the mail. This isn't too unusual considering it was cold and the A/C was on. I get back in and start it up, but it is now in severe limp mode and a has horrible miss throughout the rpm range. The car won't idle without giving it gas. There is no SES light on. I tried unplugging the negative end of the battery cable to reset pcm, but that didn't help. I took it to have it scanned (by a tech that has successfully scanned it before) and the scanner said it couldn't make a connection with the PCM. Opti, fuel pump, injectors, and coil all have less than 5000 miles on them. Could this possible be a bad PCM since the scanner can't establish a connection?

I'm willing to bet the whoever tried to scan it saw the 16-pin OBD-II style ALDL connector on your 95, assumed it was an OBD-II PCM, and tried to scan it using an OBD-II scanner. Won't work, because your 95 has an OBD-I PCM, with the odd-ball-95-only 16-pin OBD-I ALDL connector.

Use an OBD-I scanner with a 12-pin->16-pin adapter, or jumper the 12-pin scanner connector to your 16-pin ALDL connector as shown on Shoebox's website:

http://shbox.com/1/xraycable.jpg

I'm not sure what scanner he is using, but he has scanned it successfully before with the same tool. He has the proper adapter for the OBDI PCM with the OBDII connector.